Rollback.

Author: Dannemann

src/main/java/com/stringcompressor/FourBitAsciiCompressor.java

@@ -42,7 +42,7 @@ public final byte[] compress(byte[] str) {
 		encode(str, len);
 
 		final int halfLen = len >> 1;
-		final byte[] compressed = new byte[halfLen + (len & 1) + (-len >>> 31)];
+		final byte[] compressed = new byte[halfLen + (len & 1) + 1];
 
 		for (int i = 0; i < halfLen; i++)
 			compressed[i] = (byte) (str[i << 1] << 4 | str[(i << 1) + 1]);
@@ -60,24 +60,19 @@ public final byte[] compress(byte[] str) {
 	 */
 	@Override
 	public final byte[] decompress(final byte[] compressed) {
-		final int compressedLen = compressed.length - 1;
-
-		if (compressedLen <= 0)
-			return new byte[0];
-
-		int cLenMinus = compressed.length - 1;
-		final int odd = compressed[cLenMinus];
-		final int dLen = odd == 1 ? (--cLenMinus << 1) + 1 : cLenMinus << 1;
+		int cLen = compressed.length - 1;
+		final int odd = compressed[cLen];
+		final int dLen = odd == 1 ? (--cLen << 1) + 1 : cLen << 1;
 		final byte[] decompressed = new byte[dLen];
 
-		for (int i = 0, j = 0; i < cLenMinus; i++) {
+		for (int i = 0, j = 0; i < cLen; i++) {
 			final byte bite = compressed[i];
 			decompressed[j++] = supportedCharset[(bite & 0xF0) >> 4];
 			decompressed[j++] = supportedCharset[bite & 0x0F];
 		}
 
 		if (odd == 1)
-			decompressed[dLen - 1] = supportedCharset[compressed[cLenMinus]];
+			decompressed[dLen - 1] = supportedCharset[compressed[cLen]];
 
 		return decompressed;
 	}